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Intracavity harmonic generation in figure-8 undulator free electron lasers
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View: Figures


Image of FIG. 1.
FIG. 1.

Sketch of the device including the optical fiber and the e-beam transport to the second undulator.

Image of FIG. 2.
FIG. 2.

Intracavity FEL intensity evolution for the first, second, and third harmonics. , , , , , , , , , and . The first harmonic is tuned at .

Image of FIG. 3.
FIG. 3.

(a) Longitudinal profile of the first (continuous) and second (dash) harmonic profiles at the 45-round trip. The dot curve reproduces the electron bunch shape. Both pulses have been normalized to unity and the ratio between the maxima is . Same parameters in Fig. 1. (b) Same as (a) for the first and third harmonics .

Image of FIG. 4.
FIG. 4.

Harmonic pulse widths vs the round trip number, same parameters in Fig. 2.

Image of FIG. 5.
FIG. 5.

(a) Pulse evolution vs length in meters in the second undulator of the optical power at about 500 nm; the maximum power corresponds to . (b) Pulse evolution of the third harmonic (166 nm), . (c) Pulse evolution of the fifth harmonic (100 nm), . The dotted curve refers to the electron bunch.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Intracavity harmonic generation in figure-8 undulator free electron lasers